长江科学院院报 ›› 2014, Vol. 31 ›› Issue (5): 74-78,83.DOI: 10.3969/j.issn.1001-5485.2014.05.015

• 岩土工程 • 上一篇    下一篇

海上风电机组基础浪致疲劳分析

靳军伟1a,1b,杨敏1a,1b,王伟2,王其标3   

  1. 1.同济大学 a.地下建筑与工程系;b.岩土及地下工程教育部重点实验室,上海 200092;
    2.上海同济启明星科技发展有限公司,上海 200092;
    3.中交上海三航科学研究院有限公司,上海 200032
  • 收稿日期:2013-04-12 修回日期:2014-05-12 出版日期:2014-05-12 发布日期:2014-05-12
  • 作者简介:靳军伟(1986-),男,河南林州人,博士研究生,主要从事岩土工程与海上风电机组基础方向研究,(电话)021-65983386(电子信箱)2010jinjunwei@tongji.edu.cn。

Analysis on Wave-Induced Fatigue of Offshore Wind Turbine Foundation

JIN Jun-wei1,2,YANG Min1,2, WANG Wei3, WANG Qi-biao4   

  1. 1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
    2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
    3.Shanghai Tongji Qiming Star Science and Technology Development Co., Ltd, Shanghai 200092,China;
    4.SHCC Design & Science Research Institute, Shanghai 200032,China
  • Received:2013-04-12 Revised:2014-05-12 Online:2014-05-12 Published:2014-05-12

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摘要： 给出了海上风电机组基础波浪荷载导致的疲劳损伤计算方法。基于随机波浪理论,依据海浪谱将随机波浪转换为一系列线性波的组合,由Morison方程计算得到波浪荷载并进行线性化。根据线性波浪荷载作用下结构的动力分析,求得结构响应并计算得到频域范围内的结构应力传递函数。根据海浪谱和应力传递函数,进而得到结构的热点应力谱。由某海域的海况分布,依据Miner线性累计损伤准则,通过假定结构长期热点应力分布为短期Rayleigh分布的组合,计算得到结构在设计周期内的累计疲劳损伤。以某单桩基础为例,验证了计算方法的可行性。计算方法对海上风电机组基础的浪致疲劳设计具有参考价值。

关键词: 海上风电机组基础, 疲劳分析, 传递函数, 谱分析

Abstract: This paper presents an approach to calculate the fatigue damage of offshore wind turbine foundation caused by wave load. On the basis of wave spectrum and random wave theory, random sea wave was transformed into a series of linear waves. The wave force was obtained and linearized by employing the Morison equation. Through dynamic analysis on the foundation structure under the liner wave force, the structure response was obtained to calculate the transfer function of structural stress within the frequency area. Furthermore, the stress spectrum of hot spot was obtained based on the wave spectrum and transfer function. By assuming that the long period hot spot stress distribution obeys short time Rayleigh model, the accumulated fatigue damage of the structure in a sea area in designed lifetime was obtained in the light of the Miner’s theory. A single-pile foundation case is taken to verify the feasibility of this calculation approach. This research could be a reference for the fatigue design of offshore wind turbine foundation.

Key words: offshore wind turbine foundation, fatigue analysis, transfer function, spectrum analysis

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